GeForce 840A and Radeon HD 2900 XT - video card comparison
Passmark - benchmark score GeForce 840A vs Radeon HD 2900 XT
GeForce 840A
1214
Radeon HD 2900 XT
679
GeForce 840A
Radeon HD 2900 XT
Architecture
Maxwell (2014−2018)
TeraScale (2005−2013)
GPU code name
GM108
R600
Market segment
Desktop
Desktop
Release date
March 2014
May 2007
Interface
PCIe 3.0 x8
PCIe 1.0 x16
Supplementary power connectors
-
1x 6-pin + 1x 8-pin
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
743 MHz
Floating-point performance
863.2 gflops
475.5 gflops
Manufacturing process technology
28 nm
80 nm
Number of transistors
-
720 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
33 Watt
215 Watt
Texture fill rate
17.98
11.89
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
64 Bit
512 Bit
Memory clock speed
2002 MHz
1656 MHz
Memory bandwidth
16.02 GB/s
106.0 GB/s
Display Connectors
No outputs
2x DVI, 1x S-Video
DirectX
12 (11_0)
10.0 (10_0)
CUDA
5.0
-
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A